1. Department of Biochemistry, University of Calcutta, 35 Ballygunge, Circular Road, Kolkata 700019, India
2. Department of Chemistry, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India
3. National Institute of Cholera and Enteric Diseases, P-33 C.I.T. Road, Scheme-XM, Beliaghata, Kolkata 700010, India